Strongly interacting bubbles under an ultrasonic horn
Strongly interacting bubbles under an ultrasonic horn
复制标题
DOI：
10.1103/physreve.77.016609
复制
发表时间：
2008-01-01
影响因子：
2.4
通讯作者：
Towata, Atsuya
中科院分区：
文献类型：
--
作者：
Yasui, Kyuichi;Iida, Yasuo;Towata, Atsuya
为了研究超声变幅杆作用下气泡运动的高速摄像实验现象，对双气泡云系统进行了气泡脉动的数值模拟。计算结果与气泡脉动的实验观测结果的比较表明，气泡脉动受周围气泡相互作用的强烈影响。在超声的稀疏阶段期间，气泡的膨胀被气泡-气泡相互作用强烈地减小。一些气泡向喇叭尖端移动，这是由于来自喇叭尖端附近的气泡的二次Bjerknes力。研究还表明，由于声辐射阻力的降低，液体中的声振幅会因气穴而大幅降低。
Numerical simulations of bubble pulsations have been performed for a system of two bubble clouds in order to study the experimentally observed bubble motion under an ultrasonic horn by high-speed video camera. The comparison between the calculated results and the experimental observation of the bubble pulsation has indicated that the bubble pulsation is strongly influenced by the interaction with surrounding bubbles. The expansion of a bubble during the rarefaction phase of ultrasound is strongly reduced by the bubble-bubble interaction. Some bubbles move toward the horn tip due to the secondary Bjerknes force acting from the bubbles near the horn tip. It has also been shown that the acoustic amplitude in the liquid is strongly reduced by cavitation due to the decrease in acoustic radiation resistance.